TA370 Series Humidity Indicator Plugs have a borosilicate glass window. Furnished with gasket, retainer, and nut. Humidit
This is a zinc-plated brass Humidity Indicator Plug with a glass window. Furnished with gasket, gasket retainer and nut. It installs into a container through a 0.515 in. (13.1 mm) diameter hole.
For optional single or multiple spot discs, refer to the table below. Suffix numbers specify optional discs. Humidity discs are not field replaceable.
Circle Card Part Number
Indicated Humidity Percentage
20, 30, 40
30, 40, 50
Weight: 0.08 lbs. (36 grams)
Maximum Internal Pressure: 10 psi
Recommended Installation Torque: 25 - 35 in. - lbs. (3.0 - 4.0 N·m)
Maximum wall thickness: 0.15 in. (4 mm)
TA371 (not shown) ‐ Same as TA370, except without nut or gasket retainer. Can be mounted in a .5000-20 UNF-2B threaded boss (see TA371 drawing).
TA372 (not shown) ‐ Similar to TA370, except with retained o-ring seal and lock nut. Mounts through a 0.515 in. (13.1 mm) diameter hole (see TA372 drawing).
TA373 (not shown) ‐ Same as TA372, except without lock nut. For mounting in a .5000-20 UNF-2B threaded boss (see TA373 drawing).
The TA370 series is appropriate for use on NEMA 1, 2, 3, 3R, 3S, 4, 5, 6, 12, 12K, and 13 enclosures, as well as IP66/IP67 enclosures. This item may also be appropriate for use on other NEMA or IP enclosures, depending upon the application. Contact AGM's Engineering department for more information.